// 多行溢出隐藏
@mixin multi-line-omit($number) {
  display: -webkit-box;
  display: -moz-box;
  -webkit-line-clamp: $number;
  -moz-line-clamp: $number;
  word-break: break-all; // 纯字母、数字
  -webkit-box-orient: vertical;
  -moz-box-orient: vertical;
  text-overflow: ellipsis;
  overflow: hidden;
}